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Abstract: The investigations about the water capacity of the forest soils rise up their sensibility for the climatic changes. In Hungary, the forest shows a climatic zonation and the productivity and the health state of trees are strongly influenced by properties of soil level. The most frequent soil type is the brown forest soil, in which the influence of the arborescent vegetation and the climatic factors are most relevant. For study the action of climatic factors about the soil structure, the physical measurements and their results as concerning the water distribution are presented. The application of this method are exemplified with two stands from Visegrád Mts., with similar geological background, but different morphology and orientation, and consequently, with different water management of the soil level. Thus, the correct estimation of the water capacity and the water retention is important to know, for prevailing the negative effects of the prognosis climatic changes.

Keyword: Hungary, Forest, Brown forest soil, Water capacity, Climatic change